wanna share for additional refference for unlocking z300a
first you need to download this
z300 modefied flashfile
then open youre setool
go to tab SEMC ODM
then add flashfile
connect youre phone
and flash
after flash unlock repair

see the imei its already change after flash from 01 to 35
then after flash check network
if still no network
jumper filter


and done done